A riding mate had a 125 Mutt, which I rode while he tried out my W650. I found the 125 terrifying . I'm used to 350 cc and above engines. Struggling on an 'A' road with a large lorry in the mirrors was no fun. More than happy to hand it back after 10 miles or so .

Ah well; small machines are definitely best on small roads - that's not A roads. If you ride small bikes (and they can be terrific fun) then plan your routes accordingly; I have ridden with friends all over the UK and France on a 125 Bantam (4hp) but only because I route plan using roads that are generally quiet (and level ) ie off the satnav radar. Definitely horses for courses.